The family's name is spelled O'Brien in the publisher's summary.
Talk about it here.
John lived with his parents in Ealing. In 2009, he was away on holiday with his parents. They went to Australia for three weeks. They bought a lot of milk from the milkman. The Milkman said that it had cost him a fortune that the family had cancelled their order.
The O'Briens' house was displaced in time, when they were gone. However, Sarah Jane Smith and her team helped to place the house into the correct time again, before the family returned from their holiday. (AUDIO: The Ghost House)